package com.jqq.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;

/**
 * @author 姬倩倩
 * @date 2023-05-11
 */
//@WebFilter(urlPatterns = "/*")
public class DemoFilter implements Filter {
    @Override//初始化方法，只调用一次
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("init方法..");
    }

    @Override//拦截到请求之后调用，调用多次
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("Demo拦截到了请求...放行前逻辑");
        filterChain.doFilter(servletRequest, servletResponse);
        System.out.println("Demo拦截到了请求...放行后逻辑");
    }

    @Override//销毁方法，只调用一次
    public void destroy() {
        System.out.println("destroy方法..");
    }
}
